Extreme sports are been categorized as such & not as normal sports just because they are very thrilling involve risk and you need extreme sports insurance. Maybe somebody can become very excited at time they see their preferred football team intercept pass & run for touch down. This little more than watching the hot dogging for example but idea is there are few more possibilities for the injury with an extreme sports. Also there are some spectator sports & individual activity sports like bungee jumping. Extreme sports are very extreme not because of thrill they will give but just because they are more dangerous than the regular sports.